teatime vs afternoon tea

teatime and afternoon tea both are nouns.

Word	Noun	Adjective	Verb	Adverb
teatime	Yes	No	No	No
afternoon tea	Yes	No	No	No

As nouns, teatime and afternoon tea are synonyms defined as:

teatime and afternoon tea: a light midafternoon meal of tea and sandwiches or cakes

Other synonyms of teatime include tea.

teatime (noun)	afternoon tea (noun)
a light midafternoon meal of tea and sandwiches or cakes	a light midafternoon meal of tea and sandwiches or cakes